2. Signaling Pathways
  3. Immunology/Inflammation
  4. NO Synthase

NO Synthase

Nitric oxide synthases; NOS

NO Synthase

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Nitric oxide synthases (NOSs) are a family of enzymes catalyzing the production of nitric oxide (NO) from L-arginine. NO synthases catalyze the oxidation of L-arginine to NO and L-citrulline. Mammals contain three NOS isoforms: neuronal NOS (nNOS), inducible NOS (iNOS), and endothelial NOS (eNOS). NO produced from these different NOS isoforms is involved in a wide range of physiologic functions in the nervous, immune, and cardiovascular systems. Unregulated NO production can lead to pathologic conditions such as stroke, inflammation, and hypertension. Therefore, the control of NOS activity by isoform selective NOS inhibitors has great potential for therapeutic treatments of NO-related diseases.

NO Synthase Isoform Specific Products:

NO Synthase Isoform Comparison
Cat. No. Product Name Effect Purity Chemical Structure
  • HY-15731S1
    Estetrol-d4 (Major)
    Estetrol-d4 (Major) is the deuterium labeled Estetrol (HY-15731). Estetrol, an orally active estrogen synthesized exclusively during pregnancy by the human fetal liver, is a selective nuclear estrogen receptor modulator. Estetrol binds ERα as well as ERβ (with a fourfold lower affinity). Estetrol increases eNOS expression/activity and NO synthesis in endothelial cells. Estetrol exerts estrogenic actions on the endometrium or the central nervous system but presents antagonistic effects on the breast. Estetrol can be used in contraception and menopausal hormone research.
    Estetrol-d<sub>4</sub> (Major)
  • HY-N9675
    (+)-Hannokinol
    		Inhibitor
    (+)-Hannokinol can be isolated from AMOMUM TSAO-KO (ginger family) fruit. (+)-Hannokinol inhibits lipopolysaccharide-induced nitric oxide production in BV2 microglia.
    (+)-Hannokinol
  • HY-N15221
    12-Acetoxyganoderic acid D
    		Inhibitor
    12-Acetoxyganoderic acid D is a triterpenoid compound found in Ganoderma sinense. 12-Acetoxyganoderic acid D exhibits certain anti-inflammatory activity and inhibits NO production in LPS (HY-D1056) stimulated RAW 264.7 macrophages.
    12-Acetoxyganoderic acid D
  • HY-N15226
    Butyrolactone Ia
    		Inhibitor
    Butyrolactone Ia is the inhibitor for the NO production with an IC50 of 18 μM. Butyrolactone Ia inhibits LPS (HY-D1056)-induced mRNA expression of iNOS and the inflammatory cytokine IL-1β. Butyrolactone Ia modulates autophagy in HeLa cells, and exhibits immune suppressive activity.
    Butyrolactone Ia
  • HY-176779
    Guanidino ethyl disulfide
    		Inhibitor
    Guanidino ethyl disulfide (GED) (Compound 23) is a NO Synthase (NOS) inhibitor with EC50s of 110, 630 and 180  μM for iNOS, eNOS and bNOS, respectivly. Guanidino ethyl disulfide effectively inhibits nitrite production in J774.2 macrophages. Guanidino ethyl disulfide can be used for circulatory shock, inflammation and neurological diseases research.
    Guanidino ethyl disulfide
  • HY-170957
    5-LOX/NO-IN-1
    		Inhibitor
    5-LOX/NO-IN-1 (Compound 7e) is a 5-LOX and NO release inhibitor. 5-LOX/NO-IN-1 shows an IC50 of 2.833 μM for 5-LOX. 5-LOX/NO-IN-1 has anti-inflammatory effects.
    5-LOX/NO-IN-1
  • HY-147769
    Anti-inflammatory agent 23
    		Inhibitor
    Anti-inflammatory agent 23 (Compound 4m) is an anti-inflammatory agent. Anti-inflammatory agent 23 inhibits the production of NO activated by LPS with an IC50 of 0.449 μM. Anti-inflammatory agent 23 has a good affinity for p65 protein.
    Anti-inflammatory agent 23
  • HY-N9376
    Kansuinine E
    		Inhibitor
    Kansuinine E is a plant-derived nitric oxide inhibitor (IC50=6.3 μM). Kansuinine E belongs to jatrophane-type diterpenoids and is isolated from the roots of E. kansui.
    Kansuinine E
  • HY-B1409S
    Isosorbide dinitrate-13C6
    Isosorbide dinitrate-13C6 is the 13C labeled Isosorbide dinitrate. Isosorbide dinitrate (ISDN) is an NO donor that prevents LV remodeling and degradation of cardiac function following myocardial infarction (MI).
    Isosorbide dinitrate-<sup>13</sup>C<sub>6</sub>
  • HY-117601
    11-Deoxyalisol B
    		Inhibitor
    11-Deoxyalisol B, a triterpene, shows the potent inhibitory activity on Lipopolysaccharide (LPS)-induced nitric oxide (NO) production.
    11-Deoxyalisol B
  • HY-N8477
    Isolupalbigenin
    		Inhibitor
    Isolupalbigenin is an inhibitor of NO. Isolupalbigenin has anti-proliferative activity on HL-60 cells with an IC50 of 5.1 μM.
    Isolupalbigenin
  • HY-N8631
    O-Acetylschisantherin L
    		Inhibitor
    O-Acetylschisantherin L (Acetylschisantherin L) is a natural lignan, which exhibits inhibitory effects on LPS-induced NO production in BV-2 cells with an IC50 of 23.1 μM.
    O-Acetylschisantherin L
  • HY-P11093
    Papiliocin
    		Inhibitor
    Papiliocin is a potent peptide antibiotic with both anti-inflammatory and antibacterial activities. Papiliocin is primarily active against Gram-negative bacteria. Papiliocin exhibits strong anti-inflammatory activity against cell, exerting its anti-inflammatory activity by inhibiting the production of NO and the secretion of TNF-α and MIP-2. Papiliocin participates in the innate defense response mechanism by inhibiting the Toll-like receptor pathway and NF-κB. Papiliocin induces apoptosis in fungal cells and increases the total level of intracellular ROS. Papiliocin acts as an effective antiseptic peptide in sepsis models. Papiliocin is useful in anti-inflammatory and antibacterial research.
    Papiliocin
  • HY-115917
    NOS-IN-3
    		Inhibitor
    NOS-IN-3 (Compound 9a) is a potent, selective, imidamide derived NOS inhibitor with an IC50 against iNOS of 4.6 μM, without inhibiting eNOS. NOS-IN-3 has little toxicity and can be studied in the research of inducible isoform involved diseases, such as septic shock.
    NOS-IN-3
  • HY-143457
    Anti-inflammatory agent 19
    		Inhibitor
    Anti-inflammatory agent 19 (compound 2b) shows NO inhibitory activity, with an IC50 of 36.00 μM. Anti-inflammatory agent 19 inhibits HMGB1-induced later inflammation. Anti-inflammatory agent 19 can be used for the research of later inflammation diseases such as coronavirus diseases (COVID-19) and sepsis, etc.
    Anti-inflammatory agent 19
  • HY-N8174
    Valeriandoid F
    		Inhibitor
    Valeriandoid F is an iridoid, which potently inhibits NO production with an IC50 value of 0.88 μM. Valeriandoid F has anti-inflammatory and antiproliferative activities.
    Valeriandoid F
  • HY-145908
    Antitumor agent-49
    		Activator
    Antitumor agent-49 (Compound 10) is a Harmine derivative-furoxan hybrids containing NO donor, with antitumor activities. Antitumor agent-49 shows cytotoxic activity against HepG2 cells with an IC50 of 1.79 µM. Antitumor agent-49 produces high levels of NO in vitro.
    Antitumor agent-49
  • HY-N2420R
    Flavokawain A (Standard)
    		Inhibitor
    Flavokawain A is a chalcone compound and an orally active inhibitor of PRMT5 and cytochrome P450. Flavokawain A has anti-inflammatory, anti-tumor, and immunomodulatory effects. Flavokawain A can inhibit the proliferation of tumor cells and induce apoptosis. Flavokawain A can be used in the research of diseases such as bladder cancer.
    Flavokawain A (Standard)
  • HY-N0918R
    Desmethoxyyangonin (Standard)
    		Inhibitor
    Desmethoxyyangonin (Standard) is one of the six major kavalactones found in the Piper methysticum (kava) plant. Desmethoxyyangonin (Standard) is a selective inhibitor of monoamine oxidase-B (MAO-B) (IC50: 0.123  µM). Desmethoxyyangonin (Standard) exerts anti-inflammatory effects by inhibiting Jak2/STAT3 and IKK signaling pathways. Desmethoxyyangonin (Standard) induces CYP3A23 expression and leads to skeletal muscle relaxation.
    Desmethoxyyangonin (Standard)
  • HY-N3426
    Kazinol B
    		Inhibitor
    Kazinol B, a prenylated flavan with a dimethyl pyrane ring, is an inhibitor of nitric oxide (NO) production. Kazinol B improves insulin sensitivity by enhancing glucose uptake via the insulin-Akt signaling pathway and AMPK activation. Kazinol B has the potential for diabetes mellitus research.
    Kazinol B
Cat. No. Product Name / Synonyms Application Reactivity
NO Synthase Isoform Comparison

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